1*0Sstevel@tonic-gate /* crypto/des/cfb64ede.c */ 2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3*0Sstevel@tonic-gate * All rights reserved. 4*0Sstevel@tonic-gate * 5*0Sstevel@tonic-gate * This package is an SSL implementation written 6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com). 7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as 10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions 11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA, 12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms 14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15*0Sstevel@tonic-gate * 16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in 17*0Sstevel@tonic-gate * the code are not to be removed. 18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution 19*0Sstevel@tonic-gate * as the author of the parts of the library used. 20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or 21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package. 22*0Sstevel@tonic-gate * 23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without 24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions 25*0Sstevel@tonic-gate * are met: 26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright 27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer. 28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright 29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the 30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution. 31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software 32*0Sstevel@tonic-gate * must display the following acknowledgement: 33*0Sstevel@tonic-gate * "This product includes cryptographic software written by 34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)" 35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library 36*0Sstevel@tonic-gate * being used are not cryptographic related :-). 37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from 38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement: 39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40*0Sstevel@tonic-gate * 41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51*0Sstevel@tonic-gate * SUCH DAMAGE. 52*0Sstevel@tonic-gate * 53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or 54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be 55*0Sstevel@tonic-gate * copied and put under another distribution licence 56*0Sstevel@tonic-gate * [including the GNU Public Licence.] 57*0Sstevel@tonic-gate */ 58*0Sstevel@tonic-gate 59*0Sstevel@tonic-gate #include "des_locl.h" 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate /* The input and output encrypted as though 64bit cfb mode is being 62*0Sstevel@tonic-gate * used. The extra state information to record how much of the 63*0Sstevel@tonic-gate * 64bit block we have used is contained in *num; 64*0Sstevel@tonic-gate */ 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate void DES_ede3_cfb64_encrypt(const unsigned char *in, unsigned char *out, 67*0Sstevel@tonic-gate long length, DES_key_schedule *ks1, 68*0Sstevel@tonic-gate DES_key_schedule *ks2, DES_key_schedule *ks3, 69*0Sstevel@tonic-gate DES_cblock *ivec, int *num, int enc) 70*0Sstevel@tonic-gate { 71*0Sstevel@tonic-gate register DES_LONG v0,v1; 72*0Sstevel@tonic-gate register long l=length; 73*0Sstevel@tonic-gate register int n= *num; 74*0Sstevel@tonic-gate DES_LONG ti[2]; 75*0Sstevel@tonic-gate unsigned char *iv,c,cc; 76*0Sstevel@tonic-gate 77*0Sstevel@tonic-gate iv=&(*ivec)[0]; 78*0Sstevel@tonic-gate if (enc) 79*0Sstevel@tonic-gate { 80*0Sstevel@tonic-gate while (l--) 81*0Sstevel@tonic-gate { 82*0Sstevel@tonic-gate if (n == 0) 83*0Sstevel@tonic-gate { 84*0Sstevel@tonic-gate c2l(iv,v0); 85*0Sstevel@tonic-gate c2l(iv,v1); 86*0Sstevel@tonic-gate 87*0Sstevel@tonic-gate ti[0]=v0; 88*0Sstevel@tonic-gate ti[1]=v1; 89*0Sstevel@tonic-gate DES_encrypt3(ti,ks1,ks2,ks3); 90*0Sstevel@tonic-gate v0=ti[0]; 91*0Sstevel@tonic-gate v1=ti[1]; 92*0Sstevel@tonic-gate 93*0Sstevel@tonic-gate iv = &(*ivec)[0]; 94*0Sstevel@tonic-gate l2c(v0,iv); 95*0Sstevel@tonic-gate l2c(v1,iv); 96*0Sstevel@tonic-gate iv = &(*ivec)[0]; 97*0Sstevel@tonic-gate } 98*0Sstevel@tonic-gate c= *(in++)^iv[n]; 99*0Sstevel@tonic-gate *(out++)=c; 100*0Sstevel@tonic-gate iv[n]=c; 101*0Sstevel@tonic-gate n=(n+1)&0x07; 102*0Sstevel@tonic-gate } 103*0Sstevel@tonic-gate } 104*0Sstevel@tonic-gate else 105*0Sstevel@tonic-gate { 106*0Sstevel@tonic-gate while (l--) 107*0Sstevel@tonic-gate { 108*0Sstevel@tonic-gate if (n == 0) 109*0Sstevel@tonic-gate { 110*0Sstevel@tonic-gate c2l(iv,v0); 111*0Sstevel@tonic-gate c2l(iv,v1); 112*0Sstevel@tonic-gate 113*0Sstevel@tonic-gate ti[0]=v0; 114*0Sstevel@tonic-gate ti[1]=v1; 115*0Sstevel@tonic-gate DES_encrypt3(ti,ks1,ks2,ks3); 116*0Sstevel@tonic-gate v0=ti[0]; 117*0Sstevel@tonic-gate v1=ti[1]; 118*0Sstevel@tonic-gate 119*0Sstevel@tonic-gate iv = &(*ivec)[0]; 120*0Sstevel@tonic-gate l2c(v0,iv); 121*0Sstevel@tonic-gate l2c(v1,iv); 122*0Sstevel@tonic-gate iv = &(*ivec)[0]; 123*0Sstevel@tonic-gate } 124*0Sstevel@tonic-gate cc= *(in++); 125*0Sstevel@tonic-gate c=iv[n]; 126*0Sstevel@tonic-gate iv[n]=cc; 127*0Sstevel@tonic-gate *(out++)=c^cc; 128*0Sstevel@tonic-gate n=(n+1)&0x07; 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate } 131*0Sstevel@tonic-gate v0=v1=ti[0]=ti[1]=c=cc=0; 132*0Sstevel@tonic-gate *num=n; 133*0Sstevel@tonic-gate } 134*0Sstevel@tonic-gate 135*0Sstevel@tonic-gate #ifdef undef /* MACRO */ 136*0Sstevel@tonic-gate void DES_ede2_cfb64_encrypt(unsigned char *in, unsigned char *out, long length, 137*0Sstevel@tonic-gate DES_key_schedule ks1, DES_key_schedule ks2, DES_cblock (*ivec), 138*0Sstevel@tonic-gate int *num, int enc) 139*0Sstevel@tonic-gate { 140*0Sstevel@tonic-gate DES_ede3_cfb64_encrypt(in,out,length,ks1,ks2,ks1,ivec,num,enc); 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate #endif 143